This also spills over into how long we let the horse have a reward "rest" after a correct response. For example we found with Bonitao if we let him rest more than 10 or 15 seconds the rest had no effect on his subsequent attempts at cued behaviour. If we let him rest just 7 seconds we felt a marked improvement in subsequent behaviour.
For example when we first started working on "forwards" and snappy transitions we played the corner game. He was required to have a forward walk or trot to the next corner of the arena and then got a rest. If the rest was a long one the next leg was no better than the first, if we shortened the rest to around 7 seconds then he seemed to remember the game and put real effort into the next leg.